When monitoring the health of your computer hardware, you need to pay attention to some key indicators and metrics that can reveal the status and condition of your components. Temperature is a critical factor, as the CPU and GPU should be kept below 80°C (176°F) under normal load and below 90°C (194°F) under heavy load. Otherwise, you may encounter thermal throttling, performance degradation, or permanent damage. Voltage should also be stable and consistent with the default or overclocked settings; too low or too high may lead to instability, crashes, overheating, power consumption, or wear and tear. The fan speed should be proportional to the temperature and load of your components; too low or too high may result in ineffective cooling or excessive noise, dust, or vibration. Finally, the SMART status of your hard drive should be healthy; if any of the attributes such as Reallocated Sector Count, Current Pending Sector Count, Uncorrectable Sector Count, or Reallocation Event Count are high or increasing, you may have a failing or damaged hard drive.